From the author of What Waits in the Woods

Hannah is excited to spend some time at her best friend Jacob's lake house this summer. A champion swimmer, Hannah is looking forward to doing daily laps and hanging out with Jacob sans parental supervision. The catch? Hannah's annoying new stepsister, Katie, is tagging along. Master of suspense Kieran Scott spins a story full of twists and turns that will leave readers gasping and guessing until the very end. (Scholastic.com)